Bicycle-pump.



No'. 656,I22. Patented Aug. l4, I900. 0. KEEN.

' BICYCLE PUMP.

(Application filed June 8, 1900.)

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NITED STATES PATENT OFFIc OTTO KEEN, OF BERLIN, WISCONSIN.

BICYCLE-PUMP.

SPECIFICATION forming part of Letters Patent No. 656,122, dated August 14, 1900.

Application filed June 6 1900. Serial No. 19,301. (No model.)

To all whom it may concern:

Be it known that I, OTTO KEEN, a citizen of.

the United States, residing at Berlin, in the county of Green Lake and State'of Wisconsin, have invented certain new and useful Improvements in Bicycle-Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in bicycle-pumps. It provides for greater convenience in pumping up the bicycle-wheel tire when deflated, the pump being an at: tachment of the wheel, consequently carried by the bicycle, and therefore always at hand for use when required. It is simple, readily applied, and can be manufactured at the minimum cost.

It consists of a pump-cylinder with its piston and rod, said cylinder being the moving part and having an automatic return-stroke movement, the whole adapted to be fitted to the bicycle-wheel, said piston-rod being hollow and having a valved outer end, with said end sleeved to the tire, all substantially as hereinafter more fully disclosed, and specifically pointed out by the claims.

In the accompanying drawin gs, illustrating the preferred embodiment of my invention, Figure 1 is a view showing it as applied to a bicycle, partly broken away. Fig. 2 is a longitudinal central section through the pump and a portion of the tire and a transverse section of the hub on an enlarged scale. Fig. 3 is a view in elevation, partly in section, taken at right angles to the point of view of Fig. 2. Fig. 4 is a broken detailed section showing more particularly the check-valve arranged in the outer delivery end of the hollow piston-rod. Fig. 5 is an enlarged detail view showing more particularly the piston valve.

Latitude is allowed herein as to details, as they may be changed or varied at will without departing from the spirit of my invention and the same yet remain intact and be protected.

In carrying out my invention I employ a sliding or moving cylinder or barrel 1, suitablysupported in a preferably U-shaped or yoke-like frame 2, embracing the hub of the propelling or driving wheel of the bicycle and having the outer ends of its arms suitably connected to the wheel-rim, preferably as shown.

The cylinder or barrel 1, as a convenient means to provide for its movement upon the vertical portions or arms of the yoke or frame 2, is provided with opposite apertured lugs 3 near its inner and outer ends, through which pass said arms of said frame or yoke.

The cylinder or barrel l is provided with a piston 4, preferably composed of an elastic or rubber cup or packing 5, slipped upon the piston-rod 6 and held thereon between a disk 7 below said cup or packing and a like disk or washer 8 above said cup, said disks being inserted upon said piston-rod. The disk 7 is held against downward displacement preferably by a shoulder 9 on the piston-rod 6. A sleeve 9, preferably improvised out of a wire coiled to fit upon the piston-rod into compactly-contacting coils, serves as a stop to limit the downward stroke of the piston. 10 is a removable head or cap screwed upon the barrel or cylinder 1 at its outer or lower end and having said piston-rod passing therethrough. As above intimated, the piston-rod 6 is hollow or tubular, and extends to within a short distance of the wheel-rim, and has applied thereto a preferably coiled spring 11, bearing upon the cap or head 10, and an integral enlargement or shoulder 12 on said piston-rod near its lower end. The action of the spring 11 is to impart to the cylinder an automatic return-stroke movement afterdepression, as presently explained. The hollow or tubular piston-rod 6 communicates with the chamber of the cylinder or barrel 1 to take the air forced therein as the piston is actuated and pass said air through itself and finally, as disclosed farther on, into the tire of the bicycle-wheel.

A check-valve 13, having its stem 13 extending a suitable distance into the outer or lower end of the tubular piston-rod, normally engages or faces said end of said tube under the pressure of the internal air, said valve being faced by rubber, as at 13", to cause it to fit air-tight. This arrangement removes the valve from the tire, as hereinbefore practiced. The valve 13 is confined or held in a sleeve 14, screwed upon the outer or lower end of the tubular piston-rod G, and adapted to permita limited play of said valve therein. The sleeve 14 has also a downward or-outward extension 14;, reaching to a point wi thin the plane of the wheel-rim, but not in en gagement therewith, and having a milled surface la for its convenient manipulation, as readily understood, and also screw-threaded, as at 14, to provide for the eflfective holding thereon of the nozzle 15 of a rubber or elastic diaphragm or disk 15, suitably secured upon the inside of the tire, the latter being hollow or tubular.

In operation the rider upon dismounting puts his foot upon the preferably grated or roughened footpiece orlu g 16, brazed or otherwise secured laterally to the cylinder or barrel, and by exerting downward or outward pressure thereon the cylinder is accordingly actuated, effecting the outward or downward stroke movement of said cylinder, creating a vacuum, more or less, in the cylinder or barrel. The inrushing air enters the cylinder or barrel as the latter moves downward or outward, and upon the return-stroke movement of said cylinder passes into the tubular piston-rod, thence through the nozzle or nipple 14, and finally into the tire, providing for the inflation thereof. The return-stroke movement of the cylinder is effected automatically by the action of the previously-compressed spring 11, above noted.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a pump of the character described, the combination of a moving or sliding cylinder or barrel having a fixed lateral lug, and a piston with its tubular piston-rod, a spring adapted to effect automatically the relative return stroke of the piston, a yoke or frame looped over the hub and having its ends attached to the rim adapted to carry said cylinder and connected'to a bicycle-wheel, substantially as set forth.

2. In a pump of the character described, the combination of a sliding or moving air cylinder or barrel, a piston with its hollow or tubular piston-rod, a yoke or frame, carrying said pump and serving as a guide therefor, looped over the hub and having its ends det-achably connected to the rim of a bicyclewheel, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

OTTO KEEN.

Vitnesses:

C. L. BoYDEN, II. M. BUCK. 

